I bought this intending to use it when shampooing, but I found out after purchasing that it can't be used in the bath or with shampoo, so I'm selling it. (´；ω；｀) It can be used in places without humidity or moisture, such as for a massage before shampooing. Using it before shampooing makes it easier to remove dirt from the scalp. It can also be used to relieve stiffness and massage areas like the temples, the nape of the neck, and under the ears. Massaging the hairline and temples from the bottom up can also have a lifting effect ✧︎*。 Features three modes: low speed, high speed, and rhythm mode. USB charging. Includes a USB cable (Type C). Note: AC adapter is not included. This item has only been opened and charged, so it's unused. However, please refrain from purchasing if you are looking for a perfect item or are overly sensitive.